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Dosing assembly for drug delivery device with different leads and multi-start thread section

A delivery device, thread technology, applied in the direction of drug devices, infusion sets, other medical devices, etc.

Active Publication Date: 2017-08-01
SANOFI SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In contrast, prefilled cartridges cannot be removed and replaced from these devices without destroying the device itself

Method used

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  • Dosing assembly for drug delivery device with different leads and multi-start thread section
  • Dosing assembly for drug delivery device with different leads and multi-start thread section
  • Dosing assembly for drug delivery device with different leads and multi-start thread section

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0120] Figure 1 shows a drug delivery device in the form of an injection pen. The device has a remote ( Figure 1a the left end of the center) and the proximal end ( Figure 1a the right end of the middle). The components of the drug delivery device are in figure 2 shown in . The drug delivery device comprises a body or housing 10, a cartridge holder 20, a lead screw (piston rod) 30, a drive sleeve 40, a nut 50, a dose indicator (number sleeve) 60, a button 70, a dial handle or dose Selector 80 , torsion spring 90 , cartridge 100 , metering element 110 , clutch plate 120 , clutch spring 130 and support 140 . A needle assembly (not shown) with hub and cap can be provided as an add-on component, which can be replaced as described above. All components are arranged concentrically around a common main axis of the mechanism.

[0121] The housing 10, or body, is a generally tubular member having a proximal end of enlarged diameter. The housing 10 provides a location for the li...

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Abstract

The present invention is generally directed to an assembly for a drug delivery device comprising a first threaded member (50, 50'), a second threaded member (40, 60') with a longitudinal axis and a thread (61), having at least two consecutive portions (62, 63, 64) with different leads. The first threaded member (50, 50') and the second threaded member (40, 60') are adapted and arranged to rotate with respect to one another about the longitudinal axis of the second threaded member (40, 60') during dose setting operation of the assembly, the first threaded member (50, 50') thereby being axially displaced along the second threaded member (40, 60') from a start position to an end position with respect to the second threaded member (40, 60') due to the mechanical cooperation of the first threaded member (50, 50') with the thread (61). According to the invention, a fast portion (62, 64) of the thread (61), having a greater lead than a slow portion (63) of the thread (61), comprises a multi-start thread and the slow portion (63) comprises less starts than the fast portion (62, 64). The invention is further directed to a drug delivery device for setting and dispensing a number of user variable doses of a medicament comprising such an assembly.

Description

technical field [0001] The present invention generally relates to an assembly for a drug delivery device and a drug delivery device comprising the same for selecting (setting) and dispensing a number of user variable doses of medicaments. Background technique [0002] Pen-type drug delivery devices may be used where regular injections are performed by persons without formal medical training. This may be increasingly common in patients with diabetes, and self-treatment allows such patients to effectively manage their disease. In practice, such drug delivery devices allow the user to individually select and dispense multiple user variable doses of drug. The present invention does not relate to so-called fixed dose devices, which only allow the dispensing of predetermined doses without the possibility to increase or decrease the set dose. [0003] There are basically two types of drug delivery devices: resettable devices (ie, reusable) and non-resettable devices (ie, disposab...

Claims

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Application Information

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IPC IPC(8): A61M5/315A61M5/20
CPCA61M5/20A61M5/31541A61M5/31553A61M5/31583A61M2205/583A61M2205/582A61M2205/581A61M2005/3126A61M5/31551A61M5/31593A61M5/2033A61M5/31561
Inventor A·P·默里斯P·格里芬
Owner SANOFI SA
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